干旱区生态环境知识资源中心(Arid): CFD investigation of vapor transportation in a tubular solar still operating under vacuum

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DOI	10.1016/j.ijheatmasstransfer.2020.119917
	CFD investigation of vapor transportation in a tubular solar still operating under vacuum
	Yan, Tiantong; Xie, Guo; Liu, Hongtao; Wu, Zhanglin; Sun, Licheng
通讯作者	Xie, G ; Liu, HT
来源期刊	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN	0017-9310
EISSN	1879-2189
出版年	2020
卷号	156
英文摘要	Solar stills are one of the most promising and eco-friendly solutions for providing fresh water in arid regions. This study used computational fluid dynamics (CFD) modelling to investigate the effects of operating pressure p(op) and geometrical parameters on the performance of a Tubular Solar Still (TSS), with an emphasis on vapor flow in the enclosure. The simulation results indicated that water vapor has a higher circulation velocity when operated under vacuum compared with atmospheric conditions, resulting that the yield rate increased by more than 50% at p(op) < 60 kPa. Three distinct flow regimes were observed at different thermal Rayleigh numbers Ra-T-, which were identified as steady, periodic, and chaotic flow. Steady flow was observed at low Ra-T-, while periodic or chaotic flow was observed when Ra-T exceeded 10(5) and water depth D-w exceeded 0.4r. The vapor flow in different regimes was validated by visualization experiments. Based on the simulation results, a correlation was obtained to predict the Nusselt number for a particular TSS design, which showed a deviation of -7.8-7.5% when compared with independent experimental datasets. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Tubular solar still Vacuum operation Computational fluid dynamics simulation Flow regime Natural convection
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000543005300080
WOS关键词	DIFFUSIVE NATURAL-CONVECTION ; NUMERICAL-SIMULATION ; TRIANGULAR CAVITY ; MASS-TRANSFER ; FLOW ; PERFORMANCE ; WATER ; AIR ; PRODUCTIVITY ; OPTIMIZATION
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324836
作者单位	[Yan, Tiantong; Xie, Guo; Liu, Hongtao; Wu, Zhanglin; Sun, Licheng] Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
推荐引用方式 GB/T 7714	Yan, Tiantong,Xie, Guo,Liu, Hongtao,et al. CFD investigation of vapor transportation in a tubular solar still operating under vacuum[J],2020,156.
APA	Yan, Tiantong,Xie, Guo,Liu, Hongtao,Wu, Zhanglin,&Sun, Licheng.(2020).CFD investigation of vapor transportation in a tubular solar still operating under vacuum.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,156.
MLA	Yan, Tiantong,et al."CFD investigation of vapor transportation in a tubular solar still operating under vacuum".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 156(2020).